Brake-shoe.



PATENTED JULY 16, 1907.

R. K. GASWELL.

BRAKE SHOE.

APPLICATION rum) mm: 14, 1906 2 BHEETS-SHEET 1.

PATENTED JULY-16, 190v. ASWELL.

E SHOE.

LED JUNE 14, 1908.

P. K. G

BRAK APPLICATION r1 UNITED STATES PATENT QFFICE. a

FREDERICK K. CASWELL, OF LOS ANGELES, CALIFORNIA, ASSIGNOR 'lO PAUL DICKINSON (INCORPORATED). OF CHICAGO, ILLINOIS, A CORPORATION OF WYOMING.

BRAKE-SHOE.

Specification of Letters Patent.

Patented July 16, 1907.

A li ation fil d June 14, 1908. Serial No. 821,660.

I To all whom it may concern:

Brake-Shoes, of which the following is a full, clear, and

. particularly such as are employed on railway trains and the like, and has for its primary object to provide an improved form of brake-shoe.

To the attainment of these ends and the accomplish: ment of other new and useful objects as will appear, the invention consists in. the features of novelty iii the construction, combinalonand arrangement of the several parts, hereinafter more fully described and claimed and shown in the accompanying drawings, illustrating an exemplification of this invention, and in which;- Figure 1 is a view of the blank from which the holder or shell of the shoe is formed. Figs. 2 and 3, show in perspective views, the front and back of completed holder or shell. Fig.4 is a. sectional side view of s. brake embodying my invention. Fig. 5. is a sectional view on line 5-5 of Fig.4. Kg. 6 is a partial front or face and compositions adapted to this purpose and to use the same it is necessary to provide a holder to retain the body in position, prevent breakage, and to serve as a means of fastening the shoe 'to the brakcfblock commonly known as the M C. B. or Christie head. I am aware that cast metallic brake-shoe holders are not new, but my inventionprovides an improved brake-shoe inc-ascd in s. holder struck up or formed of sheet metal, capable, of being mhnufacturcd, if desired, by automatio'machinery and combining lightness of materials with strength and securing economy in manufacture.

.l representsthe back of the shell or holder of my brakeQshoe with which is formed integrsllyside mern bers 2 and end members 3. Auxiliary end members 4 are formed integrally with side members 2. Side mombersz, end members 3, and auxiliary end members 4 are folded along broken lines as shown in Fig. 1. End members 3 are preferably folded so that their angle in relation to back 1 or to tangent to point midway between the ends of back 1 is less than ill)" thus shoe body although I preferably form them at about right angles to back and provide a number of spikes or barbs 5 which are formed in sides 2 and punched inwardly into the material forming the brake-shoe body thus serving to lock the broke-shoe body in position and' retain it. These barbs or spikes are shown at,

varying distances from the back so as to be effective regardless of the manner in which the shoe body may become worn. Auxiliary end members 4 are preferably bent, inwardly along broken lines as shown in Fig. 1 after end members 3 are formed into position. In practice I form these suxilinryend members of sufficient length to approximately moot each other when folded ever end members 3 as shown in Figs. 2 and 3'. They may, however, be much shorter without seriously detracting from the strength of my holder or shell in resisting and thrust from the brake-shoe body, although it is apparent by reference to Fig. 1 that they may be given the maximum length without loss of material in forming my blank from a strip of sheet metal of the combined width of back and side members.

Brake-shoes are commonly given suflicient curvaturc to enable the braking surface to co respond with the periphery of the wheel. My holder or she may be given any desired degree of curvature and in order to give the curvature to the sides 2 it is necessary to take care of the excess metal on the short side of the curve which 1 preferably do by shaping my forming and bonding dies to allow the metal to fold inwardlyzis at 6 in Figs. 2, 3, 5 and 6. Those inward folds onto-r corresponding indentations in the brake-shoe body and serve also to retain the body in position in the holder. As a further means of retaining the brakeshoe body in the holder spikes or barbs similar to those shown in the sides may be punched inwardly from lhc back member l ash: 7 in Fig.5.

In Fig. 4 I show a section of my brake-shoe attached to the brake-block orhcud 20, by the removable rotaining key or pin 30. To accomplish this I punch and fold outwardly from the back member the members 8 in both of which the rocta11gular lrolcs 9 are formed to permit the insertion of the key or pin 30 therein. To provide a. bearing ior tho supporting members 21 of the head or brake-block I punch and fold outwardly from the back thorncmbcrs 10 and 11, the members 10 taking the end thrust and the mom bore 11 the side thrust. The construction is further strengthened by seating the key 30 in recesses 13. in members 10.

The absence of all welding or riveting processes in the construction of my brake-shoe holder or sholl makes it udniimbly adapted for manufacture from material hooor cold in automatic nmchincs employing only the common forms of punching and forming dies.

I stood the details of an embodiment thereof have been 1 the shoe body thematerial may Zorn sheet metal embodying a-back member, side members "nuti end members, said for said end members integrally therewith and folded at l find that the-construction Ihave shown is amply strong to resist the stress of the shoe body against the ends and by dispensing with riveting or welding I simplil'y the process oi manufacture and very inaterisll'y decrease the cost thereof.

The insertion of the brake-shoe body in my holder or slfeli may be accomplished in different ways depending chiefly upon the material used in the composition of the shoe. In using wood or other materials 1 previously treated and formed the sides and ends oi my holder may be formed. around the shoe body using same in whole or in part as the die block, as is fully shown and described in my co-pending application l'or Letters Patent .on process for making brake shoe, Serial No. 348,173, filed Dec. 17, 1906, after which the retaining spikes or barbs in sides and back may be punched in weirdly. in the use of composite substances iorrning be forced into the completed holder in a plastic or semi-plastic condition and allowed to form and set under pressure or otherwise as desired.

In order that the invention might be fully undertbos specifically described, vbut What 1 claim is:- V 1. in :1 brake-shoe the combination of a holder formed side members 11nd and members being formed integrally with said back member, supports fol-med integrally on said side members and bent inwardlyaround the exterior of said end und :1 body therein.

'sshoe shell formed from sheet metal embodying a buck member, side members and end members formed an angle to said back membeixto form side and end-walls, and reinforcing auxiliary end members integral with said side members and formed :lronnd the exterior of said end members.

As an article ofnmnufactu're for forming a shell 0i holder of a brake shoe, in sheet metal blank approximately rectangular in form and having the ends thereof each divided by two diumctric slits or cuts forming three tongues or members at each end of the said blank and zuiupted 1:.- form when Lolded the end walls and the sup ports ibcrer in o. brake shoe shell.

4. in 11 l u'alce-shoe the combination of a. shell einlmdying u back member, ide members and and members. 'foruiing see,

side and end wall said end members convergent with respent to ouch other und supplr'ted by auxiliary members integral n ..l 'nlrl s in members, and a body or lll lingcmbr zed by Slll l shell.

7. in u. brulue-sboe the (-ombinniion of a shell embodying :2 buck member, (-oml. 'ent \vulls formed integrally thorowllh, sold buck member provided with integral means for. nlluclunonl to lll':ll((& l)l.il(2l( or bend, a body or filling clubrnced by said shell, and :1 barb or spike formed integrally from said shell und bent inwardly into said body or filling.

ln :1 brake-shoe the cuulbimliion of u. holder or shell, embodying a buck member, side members and eml members formed iuiegraily therewith and folded :it an angle to snid buck member to form side and end walls, said end while embodying reiiil'i'u'ciug uuxillui'y end members extending inwardly from said side members, and a body substance.

'7. in :1 broke shoe the combination of 11 holder or shell emimilyin; n bur-k mcnibz: side members and end members formed lu l-"rally tlwrewiih :iiui l'ullled to form side and vml wells, ll end walls embodying reinforcing nuxlliury llu li or b nd. mill :1 burly subsiuur-l'.

H iu broke-shouthe combination of n shell embodying:

u back member, side walls, end wulls ulul auxiliary supn'xl'lilyg, end members, moons extending inwardly from snid l back and walls to retain or lock a body substance therein and a body or filling embraced by said shell.

9. In a brake-shoe the combination of a shell embodying a back member, side walls, end walls, and auxiliary supporting end members means formed integrally with and extending inwardly from said back to retain or lock a body substance therein, and a body or filling embraced by said shell.

10. In a brake-shoe the combination of a shell embodying a back member, convergent walls comprising end members, side members and auxiliary end members integral with said side members, said walls and back member provided with means formed integrally therewith and extending inward 1y therefrom to retain or lock a body substance therein and a body or filling embraced by said shell.

11. In a brake-shoe the combination of ashell embodying a. back member, side members and end members folded to form walls, indentations or creases extending inwardly from said side members and a body or filling embraced by said shell.

12. In a brake-shoe the combination of a shell embodying a buck member convergent walls and indentations or creases extending inwardly from said walls and a. body or filling embraced by said shell.

13. In a brake-shoe the combination of a shell embodying a' back member, side members and end niembers'form lug convergent walls, spikes or'harbs extending inwardlyfrom said walls, indentations or creases extending inwardly from said side members and a body or filling embraced by said shell.

14. in :1 brake-shoe the combination ofa shell embodyingn back member, end members and side members intogral with said back member and folded to form side and end walls, said end walls embodying reinforcing nuxllinry end members extending inwardly from said side members, means extending inwardly from said side members to remin a body or filling, and a body or filling embraced by said shell.

15. in a brake-shoe the combination of :1 shell embodying a back member, end members and side members integral wlthsaid back member and folded to form side and end \valis,'snld end walls embodying reinforcing auxiliary end members extending inwnrdly'trom sold side members, means extending inwardly from said side members to remin a body or filling, means for attachment to a brake- 'block or head, and :1 body filling embraced by said shell.

16. In a broke-shoe the combination of a. shell formed of sheet metal embodying :1 back member, side members and and members forming walls, menus for locking or re mining a body substance therein, means formed integral with said back member for attachment to brake-block or bend embodying :1 member approximately midway between the ends of said buck member and extending outwardly therefrom formed to receive a removable pin or key, mem- Ill bcrs upproxlmutely near the ends oi suill'bnck nug nbm' formed to resist stress in the direction oi both longltullinnl :mli' lateral axes of said shoe, and :1 body or .iiillng our brace-ii by Silld shell. I

17. in u brake-shoe the combination of n shell formed oi sheet metal embodying :1 buck ineuiher, convergent whlls, members formed integral with said back member cut .nnll folded oulw: dly tbeicirom embodying supporting incinburs near 'removuble pi "e or key, und supporting members near the ends llu-reoi', and a body or Illllng embraced by said shell,

18. As an article of manufacture for forming n shell or hoblor ol :1 brukesboe, :1 sheet metal blank approximately rectangular in form the ends thereof divided by V shaped slits or cuts forming end members and auxiliary supporting cud members.

ll). As an article of manufacture for forming n shell or holder of n brake-shoe, n sheet metal blank upproxlnuitely rectangular in form the ends thereof divided by slits or culs approximately parallel to the sides i'oriulug cud members mid uuxllinl'y supporting end members lillll buying the members 3, provided with the rceiungulnr holes, cut on three sides for folding on the fourth sides, and the men burs iii and ll cut on three sides for folding on the fourth sides.

fill, {an on article 01' manufacture for forming a shell or rectangular in form,

- end'members, the rectangular members 5,

, holes is formed outwardly into position.

lturned nt an angle to the plane or the blank holder or a brake-shoe, a sheet metal blank approximately the corners thereof cut away at an ankle to sides and ends, the ends thereof divided by V shaped silts or eats forming end members and auxiliary s, 10 and i] cut on three sides for folding on the fourth sides and the members 8 provided with rectangular holes 9.

21. As an article of manufacture for forming a shell or holder of a brake-shoe, a sheet metal blank approximately rectangular in form, the ends thereof divided by slits or cuts approximately parallel to the sides forming end members and auxiliary supporting end members and holes near the center of the blank adapted to receive a retaining key or pin'when the material immediately surrounding the said 22. As an article of manufacture for forming aishell or holder of a brake-shoe, a sheet metal blank approximately rectangular in form, the corners thereof cut away at an angle to sides and ends, the ends thereof divided by slits or cut! approximately parallel to the sides forming end members and auxiliary supporting end members and holes near the center of the blank adapted to receive a retaining key or pin wllen the material immediately surrounding the said holes in formed outwardly into position.

23. As an article of manufacture a shell or holder of a brake-shoe formed from a blank, said blank having slits in along a line of fold extending between the inner ends at" its ends dividing the ends into main end members and renngle to the side walls of the blank on lines of fold extendlnner ends of the slits outwardly and at an angle to the first said line of fold, and said side walls being each on a slit at onev line otjold ektending from the inner end of the end of the blank to the inner end of the dlametrie slit at the opposile end of the blank.

24. As all artirle oi? manufacture a shell or holder of a brake-shoe formed from a blank, said blank having slits in lnforeing end members and side walls, the main end members being turned at an angle to the plane of the blank along a line of fold extending between the inner ends of the slits, said reinforcing end members being turned at an angle to the side walls of the blank on lines of fold extending from the inner ends of the slits outwardly, and said waiis being turned at an angle to the plane ot the blank extending from the inner end of the blank to the inner end oi the diametrie slit at the npposlie end of vthe blank.

25. in a brake-shoe, the combination of a sheet metal back member, means on one side thereof for attaching thereto a body memberor ,illling, means on the reverse side thereof adapted in attach the same to a brake-block or head, said means embodying means approximately midway between the ends of said back member adapted to receive a locking key or pin, means near the ends of said back member and folded outwardly therefrom adapted to take side thrust and means between said last mentioned menus and the ends of said lltN'k member adapted to take end thrust, and a recess on said last mentioned means adapted to furnish a seat for said locking key or pin and support it lateral movement.

In testimony whereof I have signed my name to this specification, in the presence of two subserlbing witnesses. on this 12th day of June, A. i). 1906.

FREDERICK K. (.ASiVblLil.

Witnesses J. ll. Joeulm, Jr.,

its ends dividing the ends into main end members and re- (ill 

